Radio Broadcast (May 1929-Apr 1930)

MANUFACTURERS' BOOKLETS A Varied List of Books Pertaining toRadio and Allied Subjects Obtainable Free With the Accompanying Coupon 1. Filament Control — Problems of filament supply, voltage regulation, effect on various circuits, and circuit diagrams of popular kits. Radiall Company. 5. Carborundum in Radio — Pertinent data on crystal detectors with hook-ups, and information on the use of resistors. The Carborundum Company. 12. Distortion and What Causes It — Hook-ups of resistance-coupled amplifiers with standard circuits. Allen-Bradley Company. 17. Bakelite — A description of various uses of bakelite in radio, its manufacture, and its properties. Bakelite Corporation. 22. A Primer of Electricity — Fundamentals of electricity with reference to the application of dry cells to radio. Constructional data on buzzers, automatic switches, alarms, etc. National Carbon Company. 23. Automatic Relay Connections — A data sheet showing how a relay may be used to control A and B circuits. Yaxley Manufacturing Company. 30. Tube Characteristics — A data sheet giving constants of tubes. C. E. Manufacturing Company. 32. Meters for Radio — A book of meters used in radio, with diagrams. Burton-Rogers Company. 33. Switchboard and Portable Meters — A booklet giving dimensions, specifications, and shunts used with various meters. Burton-Rogers Company. 37. Why Radio is Better with Battery Power — What dry-cell battery to use; their application to radio, wiring diagrams. National Carbon Company. 46. Audio-Frequency Chokes — A pamphlet showing positions in the circuit where audio-frequency chokes may be used. Samson Electric Company. 47. Radio-Frequency Chokes — Circuit diagrams illustrating the use of chokes to keep out r. f. currents from definite points. Samson Electric Company. 48. Transformer and Impedance Data — Tables giving the mechanical and electrical characteristics of transformers and impedances, together with a short description of their use. Samson Electric Company. 53. Tube Reactivator — Information on the care of vacuum tubes, with notes on reactivation. The Sterling Manufacturing Company. 57. Filter Data — Facts about the filtering of d. c. supplied by means of motor -generator outfits used with transmitters. Electric Specialty Company. 58. How to Select a Receiver — A common-sense booklet describing what a radio set is, and what you should expect from it, in language that anyone can understand. Day-Fan Electric Company. 67. Weather for Radio — A very interesting booklet on the relationship between weather and radio reception, with maps and data on forecasting the probable results. Taylor Instrument Companies. 69. Vacuum Tubes — A booklet giving the characteristics of the various tube types with a short description of where they may be used in the circuit; list of American and Canadian broadcast stations. Radio Corporation of America. 72. Plate Supply Systems. Technical information on audio and power systems. Bulletins dealing with twostage transformer amplifier systems, two-stage pushpull, three-stage push-pull, parallel push-pull, and other audio amplifier, plate, and filament supply systems. American Transformer Company. 73. Badio Simplified — A non-technical booklet giving pertinent data on various radio subjects. Of especial interest to the beginner and set owner. Crosley Radio Corporation. 76. Radio Instruments — A description of various meters used in radio and electrical circuits together with a short discussion of their uses. Jewell Electrical Instrument Company. 78. Electrical Troubles — A pamphlet describing the use of electrical testing instruments in automotive work combined with a description of the cadmium test for storage batteries. Of interest to the owner of storage batteries. Burton Rogers Company. 88. Super-Heterodyne Construction — A booklet giving full instructions, together with a blue print and necessary data, for building an eight-tube receiver. The George W. Walker Company. 89. Short-Wave Transmitting Equipmf.nt. Data and wiring diagrams on construction of all popular short-wave transmit ters, operating instructions, keying, antennas; information and wiring diagrams on receiving apparatus; data on variety of apparatus used in highfrequency work. Radio Engineering Laboratories. 90. Impedance Amplification — The theory and practice of a special type of dual-impedance audio amplification. Alden Manufacturing Company. 95. Resistance Data — Successive bulletins regarding the use of resistors in various parts of the radio circuit. International Besistance Company. 98. Copper Shielding — A booklet giving information on the use of shielding in radio receivers, with notes and diagrams showing how it may be applied practically. Of special interest to the home constructor. Tin: Copper and Brass Besearch Association. 99. Hadio Convenience Outlets — A folder giving diagrams and specifications for installing loud speakers in various locations at some distance from the receiving 8Ct, also antenna, ground and battery connections. Yaxley Manufacturing Company. 101. Using Chokes — A folder with circuit diagrams of the more popular circuits showing where choke coils may be placed to produce better results. Samson Electric Company. 102. Badio Power Bulletins — Circuit diagrams, theory constants, and trouble-shooting hints for units employing the BH or B rectifier tubes. Raytheon Manufacturing Company. 104. Oscillation Control with the "Phasatrol" — Circuit diagrams, details for connection in circuit, and specific operating suggestions for using the " Phasatrol" as a balancing device to control oscillation. Electrad, Incorporated. 105. Receiving and Transmitting Circuits. Construction booklet with data on 25 receivers and transmitters together with discussion of low losses in receiver tuning circuits. Aero Products Company. Two Books of Interest to Readers of Radio Broadcast Radio Broadcast Laboratory Information Sheets (Nos. 1-190) • How Radio Receivers Work By Walter Van B. Roberts Ask any newsdealer for Radio Broadcast Dala Sheets or both books may be obtained by writing to Radio Broadcast, Garden City, N. Y. Price $1.00 each 108. Vacuum Tubes — Operating characteristics of an a.c. tube with curves and circuit diagram for connection in converting various receivers to a.c. operation with a four-prong a.c. tube. Arcturus Radio Tube Company. 112. Heavy-Duty Resistors— Circuit calculations and data on receiving and transmitting resistances for a variety of uses, diagrams for popular power supply circuits, d.c. resistors for battery charging use. Ward Leonard Electric Company. 113. Cone Loud Speakers — Technical and practical information on electro-dynamic and permanent-magnet type cone loud speakers. The Magnavox Company. 114. Tube Adapters — Concise information concerning simplified methods of including various power tubes in existing receivers. Alden Manufacturing Company. 115. What Set Shall I Build? — Descriptive matter, with illustrations, of fourteen popular receivers for the set-builder. Herbert H. Frost, Incorporated. 118. Radio Instruments, Circular "J" — A descriptive manual on the use of measuring instruments for every radio circuit requirement. A complete listing of models for transmitters, receivers, set servicing, and power unit control. Weston Electrical Instrument Corporation. 120. The Research Worker — A monthly bulletin of interest to the engineer and home builder. Each issue contains special articles on radio design and construction. In sending the coupon below, make sure that your name and address are included and are plainly written. Also make sure that the listing of booklets from which you choose is that of the latest issue of the magazine, as Radio Broadcast cannot guarantee the delivery of booklets not listed in its current issue, USE THIS BOOKLET COUPON Radio Broadcast Service Department Badio Broadcast, Garden City, N. Y. Please send me (at no expense) the following booklets indicated by numbers in the published list above: Name Address (Number) {Street) {City) {State) ORDER BY NUMBER ONLY Note: Badio Broadcast assumes no liability for delivery of booklets. All requests are forwarded promptly to manufacturers who mail booklets direct to you. This coupon filled out must accompany every request. K. B. 5-29 with special emphasis on resistors and condensers. Aerovox Wireless Corporation. 123. B Supply Devices — Circuit diagrams, characteristics, and list of parts for nationally known power supply units. Electrad, Inc. 124. Power Amplifier and B Supply — A booklet giving several circuit arrangements and constructional information and a combined B supply and push-pull audio amplifier, the latter using 210-type tubes. Thordarson Electric Mfg. Co. 125. A. C. Tube Operation — A small but complete booklet describing a method of filament supply for a.c. tubes. Thordarson Electric Mfg. Co. 126. Micrometric Besistance — How to use resistances for: sensitivity control; oscillation control; volume control; regeneration control; tone control; detector plate voltage control; resistance and impedance coupling: loud speaker control, etc. Clarostat Mfg. Co. 129. Tone — Some model audio hook-ups, with an explanation of the proper use of transformers and chokes. Sangamo Electric Co. 130. Screen-Grid Audio Amplification — Diagrams and constructional details for remodeling old audio amplifiers for operation with screen-grid tubes. Thordarson Electric Mfg. Co. 131. The Mershon Condenser — An illustrated booklet giving the theory and uses of the electrolytic condenser. Amrad Corporation. 132. The National Screen-Grid Short-Wave Receiver — Constructional and operating data, with diagrams and photographs. James Millen. 133. The National Shield-Grid Five — A circuit diagram with constructional and operating notes on this receiver. James Millen. 134. Remler Service Bulletins — A regular service for professional set-builders, giving constructional data, and hints on marketing. Gray & Danielson Mfg. Co. 135. The Badiobuilder — A periodic bulletin giving advance information, constructional and operating data on S-M products. Silver-Marshall, Inc. 136. Silver Marshall Data Sheets — These data sheets cover all problems of construction and operation on Silver-Marshall products. Silver-Marshall, Inc. 139. Power Unit Design — Periodical data sheets on power unit problems, design, and construction. Baytheon Mfg. Co. 141. Audio and Power Units — Illustrated descriptions of power amplifiers and power supplies, with circuit diagrams. Thordarson Electric Mfg. Co. 142. Use of Volume and Voltage Controls. A complete booklet with data on useful apparatus and circuits for application in receiving, power, amateur transmitter, and phonograph pick-up circuits. Central Radio Laboratories. 143. Radio Theory. Simplified explanation of radio phenomena with reference to the vacuum tube, and data on various tubes. deForest Radio Company. 144. Low Filament Voltage A. C. Tubes. Data on characteristics and operation of four types of a.c. tubes. Arcturus Radio Tube Company. 145. Audio Units. Circuits and data on transformers and impedances for use in audio amplifier plate and output impedances and special apparatus for use with dynamic speakers. Sangamo Electric Company. 146. Receiver Circuit Data. Circuits for using resistances in receivers, and in power units with descriptions of other apparatus. H. H. Frost, Inc. 147. Super-Heterodyne Construction. Construction and operation of a nine-tube screen-grid superheterodyne. Set Builders' Supply Company. 152. Power Supply Essentials. Circuits and data on power-supply devices, and descriptions of power apparatus. Polymet Manufacturing Company. 155. The Custom Set-Builder — A four-page monthly bulletin containing information of interest to servicemen and custom set-builders. Clark and Tilson, Inc. 156. Photo-Electric Cells — A booklet describing the applications, theory and characteristics of photoelectric cells. The G-M Laboratories, Inc. 157. Uses of Electrical Meters — Set of blueprints showing correct use of meters in laboratory and testing circuits. Weston Electrical Instrument Corporation. 158. The Truvolt Divider. A circular describing ten popular power-pack circuits. Circuits, lists of parts, and pictures are also included. Electrad, Inc. 159. Badio Course of Instruction. A series of five lessons designed to teach boys the principles of radio design and construction. Junior Radio Guild. 160. Precision A. F. Resistance-Coupled Amplifiers. An engineering bulletin giving design data on precision a. f. amplifiers for television and laboratory experimenters. International Resistance Company. 161. Loud Speakers. A booklet considering the requisites of a good loud speaker for broadcast reception. International Besistance Company. 162. Wire-Wound High-Resistance Resistors. Descriptive circular showing uses for wire-wound highresistance resistors. The Davf.n Corporation. 163. The Burt Cell. Description of the electrical characteristics and uses of photo-electric cells. R. C. Burt Scientific Laboratories. 164. Characteristics of Bmiio Vacuum Tubes. Chart giving average characteristics of standard a.c. and d.c. tubes. The Owen Corpo»»TION. « may, 1929 . . . page 50 •